Do you have the Windows 7 cd and serial number?
Insert then run repair. Hopefully it copies the needed files off the cd.
Try: How to Repair Windows 7 - with photos
https://www.wikihow.com/Repair-Windows-7
Try: How to Repair Windows 7 without Losing Data?
https://www.ubackup.com/windows-7/how-to-repair-windows-7-without-losing-data.html
Nope.